Protection board



FIG. 1 is a front perspective view of a protection board showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevational view thereof, with the right side elevational view being a mirror image thereof; and,

FIG. 5 is a front elevational view thereof.

The broken lines in FIGS. 1-4 depict the bounds of the claimed design and form no part of the claimed design. 

CLAIM The ornamental design for a protection board, as shown and described. 